Indeed, don't loose heart about shareing. It looks like it's coming along well. You just have to think a bit before posting screens. what I mean is , are you showing us something we haven't seen before? Remember most of us have FPSC, so we've made these scenes before just messing around with the engine. i'll go through each pic to show what I mean.
pic1- meh, it's way to dark to see what's going on. It doesn't seem key to the game.
pic2- meh, I see this everytime I test my own vents and others games with vents.Once again, it doesn't seem key to the game.
pic3- Now that's more like it! It shows a great use of lighting and atmosphere. it looks like your walking over some viscuous stuff. This is what you need to showcase.
pic4&5- Theyr'e OK, It's not relevant to the story much except the blood trail but they're almost the same.
pic6- Um no. You kinda gave us nothing to look at. you mentioned you like the ligting but it's more a lack of anything that we see.
pic7- This one is better, not as good as pic3 visually, but it does let us know a bit more of where your going with the story and what not.
By no means am I an expert on these things; just thought I'de give some screenie advice.